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Finding the Fourth Proportional to 143,691.56, 215,543.28 and 54,951.56

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Solution

The fourth proportional to 143,691.56, 215,543.28 and 54,951.56 is: 82,429.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,691.56 : 215,543.28 = 54,951.56 : x
  2. Step 2: Convert to fraction form
    143,691.56/215,543.28 = 54,951.56/x
  3. Step 3: Cross multiply
    143,691.56x = 215,543.28 × 54,951.56
  4. Step 4: Simplify right side
    143,691.56x = 11,844,439,483.52
  5. Step 5: Solve for x
    x = 11,844,439,483.52/143,691.56
  6. Step 6: Final answer
    x = 82,429.61

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.